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"2175 Excavating in the prehistoric bed of the Colorado River. April 30th, 1933.
2143 View of the Arizona Spillway. April 21st, 1933.
2173 Government 150-ton Cableway and Blending Plant. April 29th, 1933.
2126 Weir section of the Nevada Spillway. April 20th, 1933."

"2175 Excavating in the prehistoric bed of the Colorado River. April 30th, 1933.
2143 View of the Arizona Spillway. April 21st, 1933.
2173 Government 150-ton Cableway and Blending Plant. April 29th, 1933.
2126 Weir section of the Nevada Spillway. April 20th, 1933."

"2175 Excavating in the prehistoric bed of the Colorado River. April 30th, 1933.
2143 View of the Arizona Spillway. April 21st, 1933.
2173 Government 150-ton Cableway and Blending Plant. April 29th, 1933.
2126 Weir section of the Nevada Spillway. April 20th, 1933."